H ere’s a travel riddle for you: I’ve been to four cities in five days, but I haven’t had to pack and repack my suitcase or check in and out of hotels. Even better, I haven’t had to organise plane tickets or figure out visa requirements, run to make connecting trains, or worry about delays. How have I done it?

I am, of course, on a cruise . The Regent Seven Seas Grandeur, which sails from Livorno to Alicante, to be exact.

Far from only appealing to retirees – as the stereotypes may go – the convenience of cruises has led to an increase in bookings from millennials such as myself, drawn by the appeal of all-inclusive food and drink, hassle-free destination hopping, and pre-planned excursions.

Millennials are burned out, overworked and overwhelmed, and we suffer from decision paralysis.…